All too often work in computational linguistics on the acquisition of conceptual descriptions takes place in isolation from work on concepts in psychology and neural science. We feel this is a mistake as evidence from these related disciplines can provide us with better ways of evaluating our results. In the talk I will present work in CIMEC on using cognitive evidence to evaluate the results of lexical acquisition work - specifically, using feature norms to evaluate the acquisition of features, and using EEG data to evaluate the results of categorization experiments.